winui-patterns

Enforce WinUI 3 MVVM binding patterns with x:Bind and DI registration.

Updated Nov 20, 2025
One-click install
npx skills add https://github.com/manx/PomodoroTimeTracker --skill winui-patterns
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: winui-patterns
Source: https://github.com/manx/PomodoroTimeTracker/tree/main/.claude/skills/winui-patterns
Command: npx skills add https://github.com/manx/PomodoroTimeTracker --skill winui-patterns

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill guides developers in adhering to WinUI 3 and MVVM best practices for the Pomodoro Time Tracker, preventing common pitfalls and ensuring consistent, maintainable, and performant UI code. It helps avoid common errors and promotes a clean architecture for the presentation layer.

Core Features & Use Cases

  • MVVM Best Practices: Enforces the use of x:Bind over Binding and discourages value converters, leading to cleaner, compile-time-checked, and more readable XAML.
  • Project-Specific Conventions: Details dependency injection registration for ViewModels (Singleton vs. Transient) and UI services, ensuring proper lifecycle management.
  • Common Mistakes: Highlights critical errors to avoid in WinUI 3 development, such as incorrect InitializeComponent placement or misuse of async void.
  • Use Case: When developing a new XAML page or ViewModel, activate this Skill to ensure your code adheres to project standards, uses correct binding modes, and avoids common WinUI 3 pitfalls, saving review time and refactoring effort.

Quick Start

Explain the correct way to bind a TextBox to a ViewModel property in WinUI 3 using the winui-patterns skill, including the recommended binding mode.

Frequently Asked Questions about winui-patterns

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I set up data binding in WinUI 3 MVVM applications?

x:Bind is the recommended binding approach for WinUI 3 MVVM development. It provides compile-time checking and better performance than Binding. Define properties in your ViewModel, reference them in XAML pages with x:Bind, and specify binding modes (OneTime, OneWay, or TwoWay) based on your data flow requirements.

What's the best way to avoid value converters in WinUI 3 UI development?

WinUI 3 MVVM patterns discourage value converters to keep XAML clean and maintainable. Instead, prepare data in your ViewModel—format strings, compute visibility states, and apply business logic before binding. This approach aligns with project conventions and simplifies code review.

How should I register ViewModels and UI services in WinUI 3 dependency injection?

Register ViewModels as Singleton or Transient based on lifecycle requirements. Singletons persist across the application; Transients create new instances per request. Follow project conventions for DI registration to ensure proper resource management and testability in your Windows App SDK projects.

What are common mistakes to avoid when building WinUI 3 XAML pages?

Avoid using Binding instead of x:Bind, placing InitializeComponent incorrectly, employing async void event handlers, and mismanaging ViewModel lifecycle. These pitfalls cause performance degradation, memory leaks, and unpredictable behavior. Adhere to MVVM patterns and project conventions to prevent them.

Can I use WinUI 3 patterns with the Windows App SDK for modern desktop applications?

Yes. WinUI 3 MVVM patterns integrate with Windows App SDK for building modern, robust desktop UIs. The patterns guide x:Bind usage, binding modes, visibility handling, and DI registration specifically for Windows App SDK projects like Pomodoro Time Tracker applications.

Why should I use explicit properties and follow MVVM conventions in WinUI 3?

Explicit properties in ViewModels enable compile-time binding verification with x:Bind, reduce runtime errors, and improve maintainability. Following MVVM conventions ensures consistent code structure, simplifies collaboration, and speeds up code review by enforcing predictable patterns across your UI layer.